Three Spanish “ultras” fans were arrested in the southern city of Nice for carrying neo-Nazi banners and another three for trying to bring flares into the stadium before Spain’s Euro 2016 match against Turkey, regional police said on Friday.

French authorities have been cracking down on more radical fan groups after clashes in Marseille last week marred the start of the month-long European Championship.

Uefa has also imposed a strict ban on all flares entering stadiums, although at several games fans have managed to get them inside.

Turkey are expected to be the latest country to face disciplinary action from Uefa after flares were lit by fans after their 3-0 defeat by Spain in Nice. Flares were seen inside the stadium after the final whistle in the Stade de Nice.

Uefa has already handed Russia a suspended disqualification from the tournament after violence inside the Stade Vélodrome in Marseille after the 1-1 draw with England.

Disciplinary proceedings have also been opened against Albania, Croatia, Turkey, Hungary and Romania for various crowd disturbances, with each case involving the use of fireworks.

On Friday Uefa confirmed it would open further proceedings against Croatia after their 2-2 draw with the Czech Republic was held up by the throwing of flares on to the pitch.